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System requirements

Supported Operating Systems:

Microsoft Windows Server 2022 (Server Core and Desktop Experience)

Microsoft Windows Server 2019 (Server Core and Desktop Experience)

Microsoft Windows Server 2016

Microsoft Windows Server 2012 R2


Support for Azure Code Signing must be installed on all Windows operating systems to install or upgrade ESET products released after July 2023. More information.

Supported Microsoft Exchange Server versions:

Microsoft Exchange Server 2019 up to CU14

Microsoft Exchange Server 2016 up to CU23

Microsoft Exchange Server 2013 up to CU23 (CU1 and CU4 are not supported)

Microsoft Exchange Server 2010 SP3 up to RU32


Standalone Client Access Server (CAS) role is not supported, see Exchange server roles for more details.

We recommend that you refer to ESET Mail Security features and Exchange Server Roles to identify what features are available for each supported version of Microsoft Exchange Server and their roles.

Minimum hardware requirements:




Intel or AMD single core x64


256 MB of free memory

Hard drive

700 MB of free disk space

Screen resolution

800 x 600 pixels or higher

ESET Mail Security has the same recommended hardware requirements that apply to Microsoft Exchange Server. See the following Microsoft Technical Articles for details:

Microsoft Exchange Server 2010

Microsoft Exchange Server 2013

Microsoft Exchange Server 2016


We strongly recommend installing the latest Service Pack for your Microsoft Server operating system and application before installing the ESET security product. We recommend installing the latest Windows updates and hotfixes whenever available.